so you hear a lot of that song, nelson mandela, nelson mandela, there's no one else like you. it keeps getting chanted over and over again. it is a lament, a prayer, but a thank you as well. >> incredible. tell me, robyn, what kind of preparations are being made now, a week out of this funeral where world leaders are expected to attend? >> reporter: what you're seeing around me now and what we've seen the past few days is essentially south africa coming together to say good-bye. but by tuesday we're going to see an influx of leaders, heads of state, royalty from around the world coming here for a memorial service at a big football stadium just outside joe han is erg berg. you're going to see the real power of nelson mandela, a man that didn't just unite his nation but found commonality with people around the world. i spoke to michelle obama, the first lady, when she visited here. this is her thoughts after she met nelson mandela. >> i told him, you know, i wanted to make sure he understood how important his leadership and sacrifice has been to who i've become, to who my husban